K League clubs tracking Perth Glory's Rhys Williams

The versatile Socceroos defender is attracting interest from South Korea including - Goal understands - the reigning K League champions

Rhys Williams could become the fourth A-League player to move to the K League this season, with reigning champions FC Seoul keen on the Perth Glory centre-back.

Williams has reportedly been on the verge of leaving Glory for over a month, with Perth rejecting interest from Sydney FC in favour of a potential transfer abroad, while the 28-year-old has also been linked clubs from South Korea, China and the Middle East.

The defender's agent Tony Rallis has told Goal that two K League clubs have approached him about signing Williams.

With the K League transfer window open until March 30, Williams is in no rush to make a decision.

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Seoul are set to begin their AFC Champions League campaign against Shanghai SIPG on Tuesday, which means they would be unable to register Williams for the continental competition if he were to join the K League champions.

With the K League operating the 3+1 foreign player quota, there are three other clubs with room to sign Williams at the time of writing - Daegu and Gwangju.